Rotary explosive-engine.



J. T. BUSI 'IN. ROTABY BXPLOSIVE ENGINE. APPLIOATIOI run 001'. 2, 1909.

2 SHEETS-SHEET 1.

WITNESSES INVENTOR 11 TTORNE Y8 'Patented Dec. 24, 1912.

J. T. BUSTIN ROTARY EXPLOSIVE ENGINE.

APPLIOA'IIOH FILED 001. 2, 1909.

Patented Dec. 24, 1912.

I1 2 sums-sum 2. l4-

INVENTOR WITNESSES 15. Z. I Jakmr [311M172 Q I Z momvzrs '.I.. B'US'IIN, OI WATEB'iOWN, MASSACHUSETTS.

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To all whom it may concern:

Be it known that I, JAMES T. Bnsrm, a citizen of the United States, and a resident of Watertown, in the county of Middlesex and State of Massachusetts, have invented a new and Improved Rotary Explosive- Engine, of which the following is a full, clear, and exact description.

The invention is an improvement 1n rotary explosive en es, and has in view a, compact engine 0 this character of a rela-v tively high efliciency and ogeratmg with little vibration, the engine em odying cylinders, a compression and an actuating lston one or more perip eral compression pockets .supportin constructed to revolve as a unit in t e respective cylinders, the compression piston having one or more peripheral compression pockets eccentrically arranged, and the actuating piston having similar expansion chambers equal in number to the pockets of the compression piston, the cylinders be-.-

ing provided with abutments coactingwith the respective pistons, and firing chambers e ual in number to the expansion pockets 0 the actuating piston and arranged to communicate therewith and receive the compressed charges from the compression piston as the two pistons revolve.-

Reference is to be had to the accompanying-drawings forming a part of this specification, in which similar characters of refrence indicate corresponding parts in both views. c

Figure 1 is a vertical section of a rotary explosive engine embodying my invention, the section being taken on the line 1-1 of Fig. 2; and Fig.2 is a central vertical section on the line 22 of Fig. 1.

In the construction of my improved engine I employ a casing 5, having a suitable base 6, the casing. being constructed 0 upper and lower sections detachably connected by flanges 7 and bolts or other suitable devices. Centrally journaled in the casing is a driving shaft 8, to which is secured a, rotor com rising a compression piston 9 and an actuating piston 10, the two pistons being integrally cast or otherwise rigidly joined to revolve as'a unit and having a dividing oove 11 centrally arranged between them, t e groove receiving an annular artition 12 secured to the'cas' the partition in connection with the rotor vidmg the easing into two distinct. cylinders. Th'e'compres'sion 'i'ston is'c'onstru'cted with Specification o! Iietters intent.

Application fled October 2, 1808. Serial No. 520,684.

Patented Dec. 24, 1,912.

a 13 eccentrically arranged, two being shown located at diametrically opposite points, and

the actuating piston is provided with a like number of expansion pockets 14.- of like construction and similar arrangement, the expansion pockets, however, as shown in the upper half portion of Fig. 1, being relatively shorter than the compression pockets 13, with the shouldered end of the compression ookets arranged a substantial distance in a vance of the corresponding, ends of the expansion pockets. Adjacent to each end of the expansion pockets the actuating piston is provided with packing strips 15 crosswise arranged and pressed out against the inner wall of the. cylinder by centrifugal action or by springs 16, as shown, a hke packing strip eing arranged adjacent to the shouldered end of each compression pocket of the compression piston.

At diametrically opposite points of the casing, preferablyat the top and bottom, are attached castings 17, each having a firing chamber 18 in communication with the cylinder of the actuating piston, and a guideway 19, in which is slidably retained an abutment 20 pressed to the periphery of thecompression piston by a spring 21, the abutment being slotted longitudinally of the cylinder, with only that ortion of the abutment at the advanced side of the cylinder bearing on the compression'piston. The explosion chamber 18 and the guideway 19 communicate through a charge inlet open-'- ing 22, this opening being cut ofi from the compression pocket when the abutments and pistons are 1n the position shown in the drawing figure, and placed in communication therewith when the abutment is forced downwardly to the bottom of the way under the action of the compression iston. At the rear side of each firing cham er 18, an abutment 23 is slidable in a slot formed in the wall of the cylinder and casting, and is forced against the actuating piston by a spring 24. At the advanced side of each abutment 20, the cylinder of thecompression-piston is provided with a vaporvmlet 25 leading from the carbureter. The'cylinder of the actuating piston is provided with exhaust opemn 26 arranged ninety degrees or more from t e expansion pocket.

The engine isstarted by cranking or other suitable way, causing the compression piston to draw the'charges'into the compression pockets. After hese pockets no i have been charged and passed to the abutments 20, the latter are projectedagainst reason of the vacuum created. The expansion pockets of the actuating piston pass into communication'with the firing chambers preparatory to the introduction of the charge in the latter, and the charges thereafter fired by the spark plugs, as shown, or

. other suitable means, causing the burnt ases pockets eccentrica 'pression piston revoluble in the other cylinbetween the abutments 23 and the s ouldered ends of the expansion pockets to act expansively until the exhaust ports 26 are reached, where the exhaust takes place. This operation is continued in the working of the engine, causing four charges to be exploded at each revolution of the pistons. Having thus described my invention, I claim as new and desire to secure by Letters Patent:

.1. In a rotary explosive engine, a casing, and a rotor revoluble in the casing, having an actuating piston and a compression piston arranged side by side and movable as a unit, the pistonsrespectively provided with expansion and compression pockets gradually diminishing in cross-sectlonal area from their active faces rearwardly. 1 ,2. In a rotary explosive engine, cylinders, an actuating piston revoluble in one of said (i linders, a firin chamber in communicat1on with the cylinder of the actuating piston, a compression piston revoluble in the other of said cylinders, and sliding abutments carried by the cylinders coacting' with the respective pistons, with the abutment coacting with the compression piston con trolling thepassage of the charge to the firing chamber. I

3. In a rotary explosive engine, cylinders, an actuatin plston revoluble, in one of, the cylinders, aving ."p'eripheral expansion y. arranged,- and 'a com- 1 de r, having compression pockets of like 'name to this specification in the p form and arrangement, with the compres- S1011 pockets in advance of and relatively longer than the expansion pockets of the actuating piston.

- 4. In a rotary explosive engine, a casing,

a ,rotor revoluble in the casing comprising an actuating piston and a compression piston, an annular partition dividing the casing into two cylinders and separating the peripheral portions of the pistons, a casting secured to the peri heral portion of the easing, having a gui eway and a firing chamber connected together by a fuel passage, with the firing chamber in communication -with the cylinder of the actuating piston, and the way leading into the cylinder of the compression piston, and an abutment bearing on the periphery of the compression piston and slidable in said guideway, controlling the flow of the gas to the firing chamber through the fuel passage.

5. In a rotary engine, cylinders, an actuating piston revoluble in one of the cylining and projecting into said groove and dividing the casing into two cylinders, a firing chamber in communication with the cylinder of the actuating piston, a way com municating with the firlng chamber, and an abutment slidable in the way against the compression piston and controlling the passage-of the fuel through the way into the fir1ng chamber.

In testimony whereof I have signed my 'esence of twosubscribing witnesses. p

I v I JAMES T. BUSTIN.

Witnesses:

Fmi onmc E. GRITOHETT, 'HmAm H. MCGLAUFLIN. 

